mkimage: configure console-setup to not touch font

Font is to be set up in u-boot by adding device-specific parameter to
the kernel commandline.

mkimage.sh

@@ -400,7 +400,10 @@ set -- "$@" \
 	--essential-hook='echo tzdata tzdata/Areas select Europe | chroot "$1" debconf-set-selections' \
 	--essential-hook='echo tzdata tzdata/Zones/Europe select Berlin | chroot "$1" debconf-set-selections' \
 	--essential-hook='echo locales locales/default_environment_locale select en_US.UTF-8 | chroot "$1" debconf-set-selections' \
-	--essential-hook='echo locales locales/locales_to_be_generated multiselect en_US.UTF-8 UTF-8 | chroot "$1" debconf-set-selections'
+	--essential-hook='echo locales locales/locales_to_be_generated multiselect en_US.UTF-8 UTF-8 | chroot "$1" debconf-set-selections' \
+	--essential-hook='echo console-setup console-setup/fontface47 select Do not change the boot/kernel font | chroot "$1" debconf-set-selections' \
+	--essential-hook='echo console-setup console-setup/fontsize string | chroot "$1" debconf-set-selections'
+
 # set up motd
 set -- "$@" \
 	--customize-hook='rm -f "$1"/etc/motd' \